In order to ensure that PVC pipes can avoid external loads and achieve the expected use environment and life, pipelines should be reasonably arranged and laid.In order to ensure the scientific and rational installation of PVC pipes, the installation design of PVC pipes needs to follow certain principles. The precautions for the installation and design of some PVC pipes are listed below.：

1. The water supply pipes should be laid outdoors and exposed to sunlight, and lightweight materials should be used for thermal insulation.

2. Metal waterproof flexible casing and effective waterproof measures.

3. PVC water supply pipes shall not pass through bedrooms and storage rooms, and shall not pass through flue or roadways.

4. Pipelines should generally be clearly set up, and in places where pipelines may be subject to collision, they should be concealed or protective measures should be taken.

5. When the water supply channel is laid in parallel with other pipelines in the same ditch (frame), it should be arranged along the edge of the ditch (frame). When laying in parallel up and down, it should not be laid on top of the hot water pipe or steam pipe, and the plane position should be staggered; when cross-laying with other pipelines, protective measures should be taken or metal sleeves should be used to protect.